Ernesto makes a snack mix. For every cup of raisins he adds 2 cups of peanuts and 3 of pretzels. What fractional part is peanuts?

the ratio of raisins : peanuts : pretzels = 1 : 2 : 3

the peanuts are how many of those 6 parts?

To determine the fractional part of peanuts in the snack mix, we need to calculate the ratio of peanuts to the total ingredients in the mix.

In this case, for every cup of raisins, Ernesto adds 2 cups of peanuts and 3 cups of pretzels. Thus, the total ingredients in each round of mixing is 1 cup of raisins + 2 cups of peanuts + 3 cups of pretzels, which amounts to 6 cups in total.

Now, let's focus on the peanuts. Ernesto adds 2 cups of peanuts for every 6 cups of ingredients.

To simplify the ratio, we can divide both the numerator and denominator by 2, resulting in 1 cup of peanuts for every 3 cups of ingredients.

Therefore, the fractional part of peanuts in the snack mix is 1/3, meaning that 1/3 of the snack mix is made up of peanuts.